共查询到19条相似文献,搜索用时 58 毫秒
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氧电极还原电催化剂对于质子交换膜燃料电池的发展具有重要的意义.综述了阴极铂合金催化剂的研究现状,包括催化剂的制备方法、影响催化剂性能的主要因素、合金催化剂性能提高的机理分析等. 相似文献
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阳极催化剂是低温燃料电池的关键材料之一,研制新型催化剂对燃料电池的性能及成本起着关键作用。从改变催化剂的组成、分散度及调控催化剂的表面结构3个方面综述了近年来低温燃料电池阳极催化剂的研究进展,并展望了该领域今后的发展方向。 相似文献
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质子交换膜燃料电池的研究进展 总被引:6,自引:0,他引:6
论述了质子交换膜燃料电池的开发现状及国内外研究进展;同时介绍了趋于成熟的贮氢技术,包括质子交换膜、双极板、膜电极和电催化剂在内的关键技术、应用以及未来展望。 相似文献
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简述了质子交换膜燃料电池(PEMFC)电催化剂研究发展的概况和催化机理研究的最新进展,并指出了PEMFC电催化剂的选择与设计应重点解决的理论指导问题. 相似文献
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以壳聚糖(CS)和2,3-环氧丙基三甲基氯化铵(GTA)为原料,制备季铵化壳聚糖(QCS),将其与小分子游离胍(Guanidine)共混,借助戊二醛(GA)的化学交联作用,将季铵化壳聚糖中的氨基以及胍中的氨基交联,形成网状结构,由此制得含有不同含量Guanidine分子的交联QCS-G阴离子交换膜。实验过程中,对该膜的含水率、溶胀度、力学强度、电导率及耐碱稳定性等进行了详细的考察。结果表明,游离胍的引入可有效地提高膜的电导率和耐碱稳定性,同时降低了膜的溶胀度及含水率。其中小分子游离胍质量分数为2.5%的膜(QCS-G2.5%)在70℃时的电导率可达到6.58×10~(-2)S/cm;在10 mol/L NaOH溶液中浸渍72 h后该膜70℃测得的电导率损失仅为3.8%,离子交换量损失仅为3.82%,表明该膜的耐碱性能较好。 相似文献
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质子交换膜燃料电池用金属双极板表面改性的研究进展 总被引:2,自引:1,他引:2
双极板是质子交换膜燃料电池(PEMFC)的重要组成部分,起收集传导电流、分隔氧化剂和燃料以及支撑电池堆等作用,占整个电池质量和成本的很大比重。目前PEMFC双极板材料主要有石墨、金属及相关复合材料。与其他双极板相比,金属双极板因具有导电导热性好、机械强度高、易加工和成本低等优点而受到重视,但其面临腐蚀及表面层钝化影响电池性能等问题。为此,国内外研究者对金属双极板的表面改性开展了广泛的研究,并取得了很大进展。 相似文献
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Jiaqi Qin Huiyuan Liu Guangqi Han Yang Lv Xiandong Wang Guanghui Zhang Yujiang Song 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(21):2207155
Catalyst coated membrane (CCM) is the core component of proton exchange membrane fuel cells and is routinely fabricated by spraying Pt/C slurries onto membrane, resulting in low activity and thick catalyst layer (CL, 5–10 µm) with an unaffordable Pt loading of 0.2–0.4 mg cm−2 and a large mass transfer resistance at cathode. Highly active ultrathin ultralow-Pt CL (UUCL) is urgently required, but remains rare. Herein, wet-chemical direct growth of UUCLs on both sides of membrane to achieve integrated ultrathin ultralow-Pt catalyst coated membranes (UUCCMs) with a cathodic CL thickness of 79.7 ± 15.0 nm and a Pt loading of 20.2 ± 1.6 µg cm−2 is reported. The key to this unique fabrication is the release of proton from membrane to regioselectively initiate the growth of interconnected Pd nanoneedle clusters array on membrane, followed by high-density deposition of Pt nanoparticles on Pd (Pt/Pd UUCLs). The single cell of UUCCMs exhibits the highest mass peak power density of 59.9 W mgPt,Cathode−1 in the literature. The exceptional activity originates from high electrochemically active surface area, remarkable oxygen reduction reaction activity closely correlated with strain, and electronic effect at Pt/Pd interface, as well as improved mass transfer and optimal water management. 相似文献
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Dustin Banham Ja‐Yeon Choi Takeaki Kishimoto Siyu Ye 《Advanced materials (Deerfield Beach, Fla.)》2019,31(31)
While proton exchange membrane fuel cells (PEMFCs) continue to expand into commercial markets, there is still pressure to decrease cost. One of the largest opportunities to reducing cost is to reduce the amount of platinum‐group metal (PGM) catalysts used in the electrodes (particularly the cathode). Over the past decade, exciting advances in the Fe/N/C family of PGM‐free oxygen reduction reaction (ORR) catalysts has provided great optimism that not only can PGMs at the cathode be reduced but possibly be completely eliminated. In fact, in September 2017, Ballard Power Systems announced the commercialization of the world's first PEMFC product to utilize a PGM‐free catalyst at the cathode (FCgen‐micro (non‐precious‐metal catalyst, NPMC)). However, for these catalysts to be used in more demanding applications, an improved understanding and new design approaches for PGM‐free catalyst layers will be required. Herein, some of the latest research on both modeling and experimental studies in the field of PGM‐free catalyst layer research are discussed. In addition, a short discussion on Ballard's new NPMC is provided. 相似文献
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概述了近几年来燃料电池用磺化聚醚醚酮(SPEEK)质子交换膜的研究进展,分别从聚醚醚酮(PEEK)磺化制备SPEEK、SPEEK薄膜的制备和改性SPEEK薄膜等几个方面总结了SPEEK质子交换膜的研究结果,并分析展望了研究工作的发展趋势. 相似文献